Shuttle for sewing-machines



' (No Model.)

.P. DIEHL. SHUTTLE FOR SEWING MACHINES.

No. 530,095. Patented Dec. 4, 1894.

UNITED STATES ATENT OFFICE,

PHILIP DIEHL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGERMANUFACTURING COMPANY OF NEW JERSEY.

SHUTTLE FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 530,095, dated December4, 1894.

Application filed Tune 9, 1894. Serial No. 514,029. (No model.)

To a whom it may concern:

Be it known that I, PHILIP DIEHL, a citizen of the United States,residing at Elizabeth, in the county of Union and State of New Jersey,have invented certain new and useful Improvements in Sewing-MachineShuttles, of which the following is a specification, reference being hadtherein to the accompanying drawings.

My invention relates to that class of shuttles adapted to oscillate incircular shuttle races, and my invention has for its object to provide athin shuttle more particularly intended for use in multiple sewingmachines in which it is desirable to employ a number of closely-placedshuttles.

In order that the shuttles of a multiple sewing machine may be placednear together it is necessary that the same should be made comparativelythin, and to this end it is desirable to supply these thin shuttles withcops of thread, rather than with bobbins. In us ing cops of thread inshuttles of this class towhich my invention relates, more or less'difticulty has been experienced in the use of cops from the centers of whichthe thread is drawn, as when a cop has been nearly used up the shellcomposed of the last few layers of thread is liable to collapse, andthus the thread may become tangled and broken.

My invention has for its object to provide a shuttle, of the classreferred to, which will be free from the objections existing in similarshuttles heretofore constructed. To this end my improved shuttle isprovided with a thread cavity which is preferably eccentric to the axisof oscillation vof the shuttle (to enable the needle loops to be castoff earlier in the movements of the shuttle than would be possible witha shuttle having a thread cavity or chamber concentric with its axis ofmovement) said thread cavity having at or near its center a stud or poston which a cop of thread, having a central opening, will be heldstationary relative to the shuttle, said stud or post preferably havingits exterior somewhat roughened to prevent the cop, fitted somewhattightly thereon, from turning, and said stud or post having through it athread delivery hole or aperture from which the thread of the cop, drawnfrom the exterior of the latter, may be passed. I

The rear wall of the shuttle is cut away for the reception of a tensionspring which can lie in the recess provided for it so that its outer orrear face will be just flush with the outer or rear faceof said wall,the tension spring being provided with an open slot leading into athread delivery hole or aperture which is nearly concentric with theaxis of. oscillation of the shuttle, and thus the said shuttle,notwithstanding the fact that the thread cavity may be eccentric to itsaxis of movement, will have a thread delivery which is near the centerof its axis of oscillation.

The tension spring is attached to the body of the shuttle near theperiphery of the latter, and its free end presses against the rear endof the stud or post on which the cop of thread is held, the outer end ofsaid stud or post being partly cut away for the reception of said springso that the latter will not project out beyond the outer face of therear wall of the shuttle.

To provide for a friction surface of suitable extent, to make a smoothand efficient tension pressure on the thread, the hole through said studor post, through which the thread running from the exterior of the copis delivered, instead of being made straight through said stud or postis preferably made as an inclined funnel so that the thread delivery endof said hole, at the rear part of said stud or post, will be far enoughaway from the thread delivery hole in the tension spring to furnish anextended tension bearing for the thread.

The thread cavity of the shuttle is closed by a hinged cover having aperipheral, inturned lip which, when the said cover is closed, fitsagainst an annular shoulder formed on the wall of the thread cavity inthe shuttle, said hinged cover having a spring finger provided with aslight projection adapted to snap into a recess in the wall of the saidthread cavity to hold the cover closed.

In the accompanying drawings Figure 1 is a perspective view of myimproved shuttle, with the cover partly lifted. Fig. 2 is a front viewof the same, with the cover raised at right angles to the body of theshuttle. Fig. 3 is a rear view with the tension spring in place, andFig. 4 is a similar view with the tension spring removed. Fig. 5 isacross section on line 5-5 of Fig. 2, and Fig. 6 is a detail section online 6-6 of Fig. 2.

A denotes the shuttle body provided with a peripheral rim portion aadapted to fit in the shuttle race and having a loop-seizing point orbeak a. The shuttle body A is formed with a thread cavity or chamber 5which is preferably eccentric to the axis of 0scillation of the shuttle,said thread cavity having at or near its center a stud or post throughwhich runs an inclined thread delivery hole (1 made in the form of aninclined funnel. The rear wall a of the shuttle body is provided with arecess a for the reception of a tension spring e which is attached, by ascrew e, to the peripheral rim portion of the shuttle; said tensionspring being provided at its free end with a thread delivery hole 6which is arranged to be nearly concentric with the axis of oscillationof the shuttle, into and which, from the extreme end of said spring,opens a threading slot e By inclining the tapering thread delivery hole02 through the post a, as more clearly shown in Fig. 5, its threaddelivery portion at the rear side of the shuttle will be farther fromthe thread-delivery hole 6 in the tension spring than would be the casewere said hole d made straight through the said stud or post, and thisinclined position of the said hole (Z affords a longer bearing surface,at c, on the rear end of the said post, for the pressure of the tensionspring against the thread, than would otherwise be provided; so that thefriction surface between the rear end of said post and said tensionspring will be of sufficient extent to insure a smooth and eliicienttension on the thread.

The stud or post 0 is intended to tightly fit a central opening in a copof thread, so that the said cop will be held stationary on the said studor post; and to more securely hold the cop of thread stationary on thesaid stud or post the surface of the latter is preferably corrugated orotherwise roughened or notched so that it will have a suitablefrictional hold on the cop of thread placed thereon, and from theperiphery of which cop the thread will run through the hole (I in thesaid stud or post as it is delivered.

The thread chamber of the shuttle is closed by a hinged cover f,preferably provided with an annular, inturned lip f to fit closelyagainst an annular shoulder a formed for its reception on the wall ofthe said thread chamber, said cover having also a spring finger f whichwill preferably be provided with a slight projection f adapted to springinto a slight recess a formed for its reception in the wall of thethread chamber, to hold the cover closed.

With my improved shuttle constructed as above described I am enabled tosecure a proper tension on the thread in a shuttle having a threadcavity which is eccentric to the axis of oscillation of the saidshuttle, this eccentric arrangement of said thread cavity beingdesirable for the reason that a shuttle thus constructed can cast offthe loops of needle thread earlier in its oscillating movements in themachine than is possible with a similar shuttle having a thread cavitywhich is concentric with its axis of oscillation. Furthermore, myimproved shuttle is specially adapted to carry a cop of thread heldtherein in such a manner that the thread may be entirely used up withoutdanger of breaking the thread by any tangling of the same incidental tothe collapsing of a nearly used-up cop; while the cover of the shuttle,having the inturned lip fitting against a shoulder around the wall ofthe thread chamber, provides means for securely closing the shuttle andthereby inclosing the cop of thread without leaving any inwardlyprojecting part against which the thread could, by any possibility, comein contact. In other words, the inturned annular lip on the coverfitting against a shoulder formed for its reception on the wall of thethread cavity of the shuttle provides a smooth inclosed chamber in whichthe cop of thread is held, and avoids any catching of the thread on anyprojection within said thread chamber.

Having thus described my invention, I claim and desire to secure byLetters Patent 1. A sewing machine shuttle having athread cavity whichis provided with a stud or post having a thread delivery hole throughitfrom front to rear, combined with a tension spring recessed into therear wall of the said shuttle and arranged to press on the rear end ofthe said stud or post, said spring havingathread delivery opening whichis out of register with the outer end of said thread delivery hole ofthe said stud or post, to afford a proper friction surface between therear end of said stud or post and the inner face of said spring.

2. A sewing machine shuttle havinga thread cavity which is provided witha stud or post having a thread delivery hole through it from front torear, combined with a tension spring recessed into the rear wall of saidshuttle and arranged to press on the rear end of the said stud or post,said tension spring having a thread delivery aperture, the said threaddelivery hole through the said stud or post being inclined so as tobring its delivery end at the rear side of said shuttle as far aspossible from the said thread delivery aperture of said tension spring.

3. A sewing machine shuttle having a thread cavity which is providedwith a stud or post having a thread delivery hole throughit from frontto rear, combined with a tension spring recessed into the rear wall ofthe said shuttle, and arranged to press on the rear end of the said studor post, and the latter having a roughened surface to afford a strongfric* ICC tional hold on a cop of thread to be placed thereon.

4. A sewing machine shuttle provided with a thread cavity which isrecessed to form an annular shoulder around the same, inside of theouterface of the body thereof, combined with a cover hinged to the body ofthe said shuttle and provided withan annular, inturned lip to fitagainst the said annular shoulder, said lip being of a thickness whichis substantially equal to the width of said shoulder so that the innerface of said lip is flush with the wall of the thread cavity, thusforming a smooth,inclosed chamber within said shuttle.

5. A sewing machine shuttle provided with a thread cavity which isrecessed to form an annular shoulder around the same, inside of theouter face of the body thereof, combined with a cover hinged to the bodyof the said shuttle and provided with an annular, inturned lip adaptedto fit against the said annular shoulder, said lip being of a thicknesswhich is substantially equal to the width of said shoulder so that theinner face of said lip is flush with the wall of the thread cavity, thusforming a smooth,inclosed chamberwithin said shuttle, said cover alsohaving a spring finger, extending from said lip, and the wall of thesaid cavity being provided with a recess to be engaged by the saidspring finger to hold the said cover closed.

In testimony whereof I afix my signature in presence of two witnesses.

PHILIP DIEHL.

